:root { --bg: #fafaf8; --fg: #1d1d1b; --muted: #6b6b66; --line: #e4e3de; --link: #2f5d8a; }
@media (prefers-color-scheme: dark) { :root { --bg: #161615; --fg: #ecebe6; --muted: #9b9a93; --line: #2c2c2a; --link: #8db4dc; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 56px 20px 80px; }
h1 { font-size: 1.9rem; margin: 0 0 4px; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 2em 0 0.4em; }
p, li { color: var(--fg); }
.muted { color: var(--muted); }
a { color: var(--link); }
nav { display: flex; gap: 18px; padding-top: 28px; margin-top: 40px; border-top: 1px solid var(--line); font-size: 0.95rem; }